W. J. V. OSTERHOUT 



17 



(Fig. 2, upper dotted line) but the resistance of the second fell (much 

 more rapidly than if it had not been removed to sea water) and eventu- 

 ally became practically stationary at 38.1 per cent (Fig. 2, lower 

 dotted line). 



One method of explaining these facts is to assume^ that the resistance 

 is proportional to a substance M (contained within the cells), which is 



1407o1 



1,000 2,000 3,000 min. 



Fig. 2. Curves showing electrical resistance of Laminaria agardhii in a solu- 

 tion containing 97.56 mols of NaCl to 2.44 mols of CaCl2 (Curve C) and in a solu- 

 tion containing 85 mols of NaCI to 15 mols of CaCh (Curve A). The dotted 

 lines show recovery in sea water. Curves B and D show the levels to which 

 the resistance rises when the tissue recovers in sea water after exposure to these 

 mixtures; their abscissae denote the times of exposure. Curve B pertains to the 

 first mixture (belonging with Curve C), whUe Curve D pertains to the second 

 mixture (belonging with Curve A). 



*C/. Osterhout, W. J. V., Proc. Am. Phil. Soc, 1916, Iv, 533. 



